Improved apparatus foe welding chain-lines



E. TANGYE; I APPARATUS FOR-WELDING CHAIN LINKS.

No. 4,722. Patented May 14,1867.

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EDWARD TANGYE', or BRUSSELS, BELGIUM. Lam-3 Patent No. 64,722, dated May 14, 1867; mama April 26, 1867.

IMPROVED APPARATUS FOR WELDING CHAIN-LINKS.

'Jlgc fitlgch'nic l'ttll'lth ta in first f icttus punt amt mating put at the same.

TO ALL TO WHOM IT MAY CONCERN:

Be it known that I, ED-WAnD-TANGYE, of the firm of Tundra Buo'rnnns, of Brussels, in. the Kingdom of Belgium, manufacturers, a' subject of the Queen of Great Britain, have invented or discovered new and useful Improvements in the Manufacture of Welded Iron Chain and Welded Steel Chain, and in tools to be employed in the said manufacture, and I, the said EnwAnD TANGYE, do hereby declare thenature of the said invention, and in what mannert-he same is to be performed, to be particularly described and ascertained in and by the following statement thereof, that is to say- I My invention consists ofthe following improvements in tools'to be used iii the manufacture of-welded iron chain and welded steel chain. I make the dies, by means of which I effect the welding of the links, of such a 'figure that thespace enclosed between them when they are closed nearly resembles that of thellink to be made,

such, portions only of the dies being cut away as isnecessary to admit the end of the link last formed, and through'which the link about to be welded has been passed. By giving the/dies, as far as possible, the figure of the whole of a. link, instead-of only one-half of a link, as is commonly done, I secure great uniformity in the size'of the links, which uniformity of size is,'for seme of the purposes to which chain is applied, of the utmostimports ance. One of the said dics'is fixed and the other 1novable,'the latterbeing made to descend upon the former either by the action of cams on a rotary shaft or'by' any of the other well-known methods of actuating movable dies, but I prefer to actuate themcvable die by hydraulic pressure, as hereinbefere described under the first part of my invention. In snaking chain by theuse of the tools constituting this part of my invention 1 make a semicircular bend-in the middle of the rod of which the link is to be made. 'I then pass one end of the partially-formed link through'the previously-made link, and afterwards bend the endsof the rod inwards and make them overlap one another. I afterwards heat the overlapping ends of the said partially-made link to a welding heat. I then place the partially-made link in the lower die andbring the upper die down upon it, when the welding together of the overlapping ends of the link is-eiected the pressure or'percussive' action of the movable die. As the whole of the link being welded is (with theexc'eptionof the. small part of its cold end, which is crossed by the prcviously-formed lin k,) enclosed between the dies during thewelding, the link is unable to expand either longitudinally or transversely durin." the action'cf the dies, andthe links made are consequently of uniform size I v v 7 pl Having explained the nature of my invention, I will proceed to describe, with refercncc io the accompahiying drawings, the manner inwhich the same is to. be performed.

Figured represents in vertical section, and Figure 2 in elevation, the hydraulic machinery which I use in the manufacture of welded iron chain and welded steel chain according to my invention. The said machinery diflers in no essential respect from hydraulic machinery used for other purposes, but has the modifications and additions, hereinafter explained, necessary to adapt it to the manufacture of the said chain.

a is the hydraulic cylinder, and b the ram; The cylinder a and bed 12 are made in one piece with the bracketor body 0. cf are the upper and lower dies, respectively, the former being raised and lowered by therain I) and latter being fixed on the bed d. The'passage g at the top of the cylinder at is connected with an hydraulic accumulator. The said hydraulicaccumulator consists of a chamber or Tessel, in the lower part ofwhich water has been pumped under great pressure. The uppcrpart of the said vessel or chamber contains highly compressed air, which, when the water is allowed to escape, forces the said water out of the said accumulator under ,great pressure. As the said accumulator is well known, and constitutes no part of my invention, I have not thought it necessary to'represent the same. On the top of the cylinder at are two valves 'fic', pressed upwards to their seats by springs, Byimeans of the rods k Z, acted upon by the lever m, either of the valves 7! 2' may be lowered at pleasure. When it is wished to make the upper die a descend rapidly andto weld betweenv it and the lower dief, a chain-link, in the manner hereinafter more particularly explained, the lever m is moved in the direction indicated by the arrow in fig. 1. The valve his thereby depressed, and water from the accu+ mulator passing along the passage 9 through the seat of the valve it into the passagn, enters the space-v between the top of the cylinder a and the ram 1:. The ram 1) and die a are' f'orced down rapidly, and the welding ofthe link of the chain is efiected. The lever on is now moved in a direction contraryto that indicated'by the arrow in fig. 1, by which motion the value It is allowed to close by its spring, and the valve 2 is opened. Tho

water in the cylinder ct can now escape by the passage 19, and the ram 6 is raised in the eylindera by the coiled spring q. The manner in which the lever m acts through the rods In Zon the valves 7L 1' will bereadily understood by an examination of figs. 1 and 2. My improvements in the dies to be used in the manufacture of welded iron chain and welded steel chain are illustrated in Figures 3 and 4, fig. 3' being a plazrof thc upper diennd fig. 4a plan of the lower die. The said dies (figs. 3 and 4) are represented in section at c f in iig. 1,

and in elevation at of in fig. 2. The dies (figs. 3 and 4) are marked with the same letters as in figs. 1 and 2. The said dies of have such a figure that when the die a is brought down upon the die the space enclosedbetween them resembles that of the link to be made, with the exception that such portions are cutaway as are necessary to admit of the link last formed, and through which the link about to be welded has been passed. The form of the cut-away port-ions will be understood by an examination of the drawings. .By giving the dies ef, as fares possible, the figure of the whole of a link instead of only one-half of a link, as in ordinary dies, I secure gretit uniformity in the size of the links. The dies e f may either be used with an hydraulic machine, as hereinbefore explained, or be used with any other pressing or stamping machinery by which dies are or may be worked; I prefer, however, to actuate the movable die by hydraulic pressure or by the direct action of steam applied after the manner in which -it is applied in a steam-hammer; In preparing the links to be welded by the action of the dies of I make a semicircular bend. in the middle of the rod of which the link is to be made, the said bend being so made that the two parts of the bent rod are not in the same plane. Figure 5 represents a rod so bent. One end of the bent rod, fig. 5, having been passed through the link last welded, its ends are turned inwards and made to overlap in the manner represented at 1- in Figure 6. This bending andbverlapping is elfected by the machine represented in plan in Figure 7, side elevation in Figure 8, transverse section in Figure 9, and end elevation in Figure 10. The partially-made link, fig. 5, bcingpassed through the link last made, is placed in the fixed die '8. -The movable dies t t are made simultaneously to approach each ,other by turning the handle w, 'when the curved under-cut portions 24 u (indicated in dotted lines) of the dies 15 come against the ends of the partially-formed link and bend them inwards andover one another in thetmanner shown at r, fig. 6. The motion of the (lies t is effected by right and left;handed screws on the axis a, as seen in fig. 7. The hnndle ui gives motion to the dies 't. The partially-made link, fig. 5, is raised to a low red heat before being operated upon by the machine, figs. 7, 8, 9, and 10. The bent and overlapping parts r of the link are now raised to a welding heat and operated upon by thedies cf in the manner hereinbefore described, when the said overlapping parts r ol' the link are welded together by the pressure or percussive action. of the movable die. During the welding of the parts r of the link the whole of the link except that part of its cold end which is crossed by the previously formed link, is enclosed between the dies ef, and the expansion of the link, either longitudinally or transversely, during the action of the dies, is thereby prevented. Besides the welding of the parts 7 of the link the dies of alsobring the sides of the link parallel. I

Having now described the nature of my invention and the manner in which the same is to be performed, I

wish it to be understood that I do not limit myself to the precise details herein described and represented in the'drawings, as thesame may be varied without departing tron the nature of my invention, but I claim as my inventioni The improvements in tools foiwelding the links of welded iron'chain and welded steel chain hereinbefore described and illustratedin figs. 1, 2, 3, and 4 of the accompanying drawings.

EDWARD TANGYE.

Witnessesz' EBENEZER Fons'rsr; BsLLows, PETER. Vrsnssonc. 

